Improvement in ore-washing machines



. n.1. RDBBINS. Ure-Washing Machines.

Patented Sept`.1,1874

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'O l@ O 0| UNITED y STATES PATENT OFFICEu CHARLES P. ROBBINS, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN ORE-WASHING MACHINES.

Specification forming part of Letters Patent No. 154,619, dated September 1, 1874 application filed July 11, 1874.

To all whom it may concern:

Be it known that I, CHARLES P. RoBBINs, of San Francisco, inthe county of San Francisco and State of California, have inventeda new and valuable Improvement in Ore -Washing Machine; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of a sectional view of my ore washing and separating machine. Fig. 2 is a plan view of the same. Fig. 3 is a sectional detail view of the same.

This invention [has relation to ore-washing machines; and it consists in a wash-tub having a horizontal perforated partition and a dischargespout, and which is supported upon anti-friction balls, in combination with a wristpin applied eccentrically on the end of a driving-shaft, whereby a rapid circular motion can be imparted to the said tub, and the material therein violently agitated,`as will be hereinafter more fully explained.

In the annexed drawings, A designates a suitable frame, on which is mounted a horizontal table, A. On this table A is supported, by means of anti friction balls, a circular tub, G, in which the washing is done. The balls b have a limited play between cups a a', fixed to the table A and bottom of the tub G, consequently the latter is free to be moved. The tub is provided with a spout or sluiceway, g, and also witha horizontal partition, H, which latter is perforated at t for the passage of the material to be washed through it. The partition H is held in placel in the tub G by means of screws S, nuts p, and forked lugs l, and on the bottom of this partition studs or pins f are secured, which greatly aid in the agitation of the ore. B designates a vertical shaft, which receives rotation from a pulley, C, by means of a belt, I), which passes around a pulley, d, and which has a crank-pin, c, applied toits upper end and entering a journal-box, e, fixed centrally to the bottom of the tub G.

When the shaft B is rotated the tub G will receive a circular motion from the crank-pin c, and any material which is in the tub will be violently tossed about.

The ore to be washed is fed through the holesz' into the tub with a stream of water, and as the separation takes place, the impurities are carried oii with the water through the spout g, while the heavier material falls to the bottom of the tub and there remains.

What I claim as new, and desire to `secure by Letters Patent, is-

The tub G, provided with a studded and perforated partition, H, and spout g, and mounted on anti-friction balls b, in combination with the crank-pin c, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the preseiice of two witnesses.,

CHARLES PETER ROBBINS.

Witnesses:

DANIEL SKERRETT, J ornv TURNBULL. 

